So when you take it back to your friend of a friend + read out quotes that he stated to you like, "I hate shortcuts", "Young guys like you get ripped off", "This is a repair!" > What's he going to do about it?
He evidently didn't coat his repair with zinc-aluminum paint. Either that or the pics are of places he didn't touch at all.
If he's in the 'business', will a 'name n shame' even get him off his backside?